Two aircraft vapor trails, made at the same time, intersected at an angle, and became one, with one jet in the sky.

This isn't so much a UFO as an unusual occurance. As I was in a parking lot and happened to look into the sky, I saw two aircraft vapor trails, which intersected at an approximate 30 degree angle. At the point of intersection, one trail, traveling appx. NNW, ended, or merged with the trail traveling appx. N. There was no curviture of the NNW trail - it just immediately ended, or merged. The N. trail continued, and there was a jet making this trail, ahead of the intersect point. I could clearly make out the jet, and just as clearly, make out that there was not another jet slightly above or below. Also, it is worth noting that both trails were created at the same, or nearly the same time, as they faded out also at the same distance in the sky, and their concentration appeared to be equal. I have never seen this before,and hope that I have related it clearly for you. If you have additional questions, please do email me. ((name and e-address deleted)) Thank You

((NUFORC Note: We do not know why the one contrail disappeared from sight, but there could be any number of explanations for the phenomenon. We do not believe that contrails are related to the UFO phenomenon, and we do not believe that any of the contrails, a.k.a. "chemtrails," are intended to poison people on the ground. PD))